What should I do if the Shenzhen social security card has not been paid for several months because of changing jobs? Will the social security card be invalid if it is not renewed for a long time?

It doesn't matter to you to stop paying social security. Of course, if you are sure that you will never work in Shenzhen again, you can surrender your insurance and get back your hard-earned money. If you have a chance to come again, you can put it away without any loss (with interest). At present, the law stipulates that you can enjoy retirement benefits in Shenzhen if you buy 15 years before retirement age.

The balance of your personal medical insurance account can only be used in Shenzhen. Stop paying outpatient medical insurance for more than 3 months, and cancel the previous payment period. But there is no way to pull it out. Of course, you don't need Shenzhen medical insurance when you leave Shenzhen.

No, it's no use!

Just make up for it after a few months of suspension.

If you are registered in Shenzhen, you can pay for it yourself. If not, you can call your friend's company to pay.

Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.